April 15 marks the 10th National Security Education Day. The Security Bureau and its disciplined services and auxiliary services, together with other parties, held various activities including a flag-raising ceremony by disciplined services, the finals and award presentation ceremony of the Territory-wide Inter-school National Security Knowledge Challenge, and the launching ceremony of the new national security comic book Andy and Security Bear, with a view to creating an engaging atmosphere for safeguarding national security and enhancing public awareness of safeguarding national security.